From: J.Bruce Fields <bfields@fieldses.org>
Date: Wed, 13 Dec 2006 08:35:21 +0000 (-0800)
Subject: [PATCH] knfsd: nfsd: make exp_rootfh handle exp_parent errors
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4b41bd85d5f93af37c2730df172aeb54280be7c3;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[PATCH] knfsd: nfsd: make exp_rootfh handle exp_parent errors

Since exp_parent can fail by returning an error (-EAGAIN) in addition to by
returning NULL, we should check for that case in exp_rootfh.

(TODO: we should check that userland handles these errors too.)

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index f37df46d2eaa..0747bb5ffcf1 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1104,6 +1104,10 @@ exp_rootfh(svc_client *clp, char *path, struct knfsd_fh *f, int maxsize)
 		 path, nd.dentry, clp->name,
 		 inode->i_sb->s_id, inode->i_ino);
 	exp = exp_parent(clp, nd.mnt, nd.dentry, NULL);
+	if (IS_ERR(exp)) {
+		err = PTR_ERR(exp);
+		goto out;
+	}
 	if (!exp) {
 		dprintk("nfsd: exp_rootfh export not found.\n");
 		goto out;